CN105684272A - In-wheel motor and in-wheel motor driving device - Google Patents
In-wheel motor and in-wheel motor driving device Download PDFInfo
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- CN105684272A CN105684272A CN201480058795.XA CN201480058795A CN105684272A CN 105684272 A CN105684272 A CN 105684272A CN 201480058795 A CN201480058795 A CN 201480058795A CN 105684272 A CN105684272 A CN 105684272A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/225—Detecting coils
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/03—Lubrication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Provided is an in-wheel motor that can reduce axial direction dimensions at a low cost and without increasing radial direction dimensions. An electric motor (1), which is an in-wheel motor, is provided with the following: a motor housing (8); a motor stator (9); a rotation shaft (6); a motor rotor (10); and a rotation sensor (30). The rotation shaft (6) includes a shaft section (6a) that is rotatably supported by a plurality of bearings (11, 12), a flange section (6b) that extends from the outer circumference of the shaft section (6a) to the outer diameter side thereof, and a tubular section (6c) which extends from the outer diameter end of the flange section (6b) in parallel with the shaft section (6a) and to the outer circumference of which the motor rotor (10) is engaged. The axial direction position of the rotation sensor (30) is between the plurality of bearings (11, 12) and on the inner diameter side of the tubular section (6c) of the rotation shaft (6).
Description
Related application
The present invention requires the applying date to be on October 29th, 2013, application number to be the right of priority of the application of JP Patent 2,013 224312, overall by referring to it, it can be used as the content of the part forming the application and quotes.
Technical field
The present invention relates to the wheel hub electric motor of the driving wheel for electromobile, mixed power electric car etc. and it is assembled with the In-wheel motor drive device of this wheel hub electric motor.
Background technology
Due to the finite space being arranged at together with wheel hub electric motor and Poewr transmission mechanism etc. under the spring of the lower section being positioned at suspension device, therefore preferably axial size is short as much as possible. In addition, wheel hub electric motor is many to be combined with speed reduction unit etc., forms as In-wheel motor drive device, in this occasion, it is desired to further shorten axial size.
As the mechanism of the axial size of the In-wheel motor drive device reducing wheel hub electric motor and speed reduction unit combination, in patent documentation 1, about the shell of aluminum alloy, people propose there is following structure, wherein, speed reduction unit side and wheel hub electric motor side are structure as a whole, and wheel hub bearing is fixed on end face outside parts.
In addition, in patent documentation 2, for the electric motor supporting structure of hybrid-electric car etc., it is proposed to there is following structure, wherein, by turn-sensitive device being arranged at the radial outer diameter side of rotor bearing bearing, shorten the axial length of electric motor entirety.
Prior art document
Patent documentation
Patent documentation 1:JP JP 2012 No. 148725 publications
Patent documentation 2:JP JP 2000 No. 224813 publications
Summary of the invention
The problem that invention to be solved
Patent documentation 1, by the improvement of shell, shortens axial size, it does not have about the description of turn-sensitive device. But, in the wheel hub electric motor of reality, the turn-sensitive device of the rotation of detection rotor is arranged at the inside of motor casing. Such as, if be described by the wheel hub electric motor of electric motor 1 formation as shown in Figure 3, then turn-sensitive device 30 is arranged at the end with speed reduction unit 2 opposite side of motor casing 8 inside, and this turn-sensitive device 30, in the axial size of shortening, forms obstacle. Namely, due to turn-sensitive device 30 be arranged at electric motor rotor 10 axis with speed reduction unit opposite side, and then the side contrary with speed reduction unit of the axis at turn-sensitive device 30, the bearing 11 of the turning axle 6 of supporting motor 1 is set, therefore the radial center portion 8A about the motor casing 8 arranging position at least forming bearing 11, it is necessary to require to stretch out to axially outside.
In patent documentation 2, owing to turn-sensitive device is arranged at the radial outer diameter side of rotor bearing bearing, therefore axial length can be shortened, but, there is the danger that radial dimension becomes big. Owing to wheel hub electric motor is arranged at the inside diameter of wheel, therefore also cannot avoid the situation that radial dimension becomes big. In addition, in patent documentation 2, cause the maximization of sensor itself, cost height. In addition, because of the moment of flexure load of automobile, vibration etc., the gap between itself and sensor changes, and also produces the situation of accuracy of detection instability. Thus, the technology of patent documentation 2 is difficult to use in wheel hub electric motor.
It is an object of the invention to provide a kind of wheel hub electric motor and In-wheel motor drive device, wherein, turn-sensitive device is arranged in motor casing, can not increase radial dimension and reduce axial size at low cost.
Another object of the present invention is to form the stable wheel hub electric motor of accuracy of detection and In-wheel motor drive device.
For solving the technical scheme of problem
The wheel hub electric motor of the present invention comprises: motor casing; Motor stator, this motor stator is fixed on this motor casing, has magnetic core and coil; Turning axle, this turning axle, via multiple bearing, is rotatably supported on above-mentioned motor casing; Electric motor rotor, this electric motor rotor has permanent magnet, is mounted according to the mode rotated integrally with above-mentioned turning axle, can rotate relative to above-mentioned motor stator; Turn-sensitive device, this turn-sensitive device detects the revolution of above-mentioned electric motor rotor. Above-mentioned turning axle comprises axle portion, flange part and cylindrical portion, and this axle portion passes through above-mentioned multiple bearing by free rotary ground supporting; This flange part expands from the periphery in this axle portion to outside diameter; This cylindrical portion from the external diameter end of this flange part parallel with above-mentioned axle portion extend, be fitted together to above-mentioned electric motor rotor in the periphery of this cylindrical portion. The axial location of above-mentioned turn-sensitive device, between above-mentioned multiple bearing, is arranged at the internal side diameter of the above-mentioned cylindrical portion of above-mentioned turning axle.
According to the program, by turn-sensitive device being arranged at the internal side diameter of the cylindrical portion of turning axle, the bearing arranging turn-sensitive device side in multiple bearings of this turn-sensitive device and supporting rotating shaft can be arranged near axial centre side. Thus, the axial size of wheel hub electric motor can be shortened. In addition, by turn-sensitive device being arranged at the internal side diameter of the cylindrical portion of turning axle, turn-sensitive device can be reduced, reduce costs. Further, owing to turn-sensitive device is arranged between multiple bearing, therefore bearing can not be arranged in the mode that radial direction overlaps with turn-sensitive device, can suppress the radial dimension of wheel hub electric motor.
Further, being embedded in the periphery of the cylindrical portion of turning axle due to electric motor rotor, turn-sensitive device is arranged at the internal side diameter of the cylindrical portion of turning axle, therefore relative motor stator, electric motor rotor, turn-sensitive device is in the state at the hidden back in cylindrical portion. Thus, the impact in the magnetic field of the magnet of the magnetic core from motor stator, electric motor rotor can be reduced.
Also can in the present invention, above-mentioned turn-sensitive device comprises stator department and rotor portions, and this stator department is arranged in above-mentioned motor casing, and this rotor portions is arranged on above-mentioned turning axle, and this turn-sensitive device is winding type. In the occasion of the program, owing to arranging the rotor portions of turn-sensitive device on the turning axle supported by multiple bearing, therefore rotor portions is difficult to produce vibration, and accuracy of detection is stablized.In addition, owing to adopting the turn-sensitive device of winding type, therefore it is difficult to be subject to the impact of noise, even if when, low temperature wet at height, vibration etc., still can use.
Having, said stator portion and rotor portions also can be arranged in the side by side radial of above-mentioned turning axle mutually again. In this occasion, the length of the turning axle of turn-sensitive device can be shortened, turn-sensitive device can be arranged at the inside of motor casing compactly. If arranging stator department and rotor portions, owing to forming wider sensor setting space between the axle portion of turning axle and cylindrical portion, therefore turn-sensitive device can be arranged in this sensor setting space.
Such as, above-mentioned turn-sensitive device can be rotating transformer. The impact being difficult to be subject to noise due to rotating transformer, even if when, low temperature wet at height, vibration etc., still can using, resolving power height, therefore be suitable for the wheel hub electric motor of automobile.
The In-wheel motor drive device of the present invention comprises: above-mentioned wheel hub electric motor; The wheel bearing of supporting wheel; Speed reduction unit, this speed reduction unit makes the rotational deceleration of above-mentioned wheel hub electric motor, is passed to above-mentioned wheel bearing. By adopting the wheel hub electric motor of above-mentioned arbitrary the structure of the present invention, equally in this In-wheel motor drive device, do not increase radial dimension, axial size can be shortened at low cost.
In addition, in the In-wheel motor drive device with above-mentioned wheel hub electric motor and speed reduction unit etc., also can comprising: lubricating oil feed mechanism, the supply of this lubricating oil feed mechanism is used for the lubrication of above-mentioned speed reduction unit and the lubricating oil of the cooling these two aspects of above-mentioned wheel hub electric motor. Thus, the mechanism of lubrication and cooling is simplified.
Arbitrary combination at least two structures disclosed in claim book and/or specification sheets and/or accompanying drawing all comprises in the present invention. Particularly, the arbitrary combination of the two or more of the every claim in claim book is also contained in the present invention.
Accompanying drawing explanation
According to the explanation with reference to the preferred form of implementation below accompanying drawing, can more clearly understand the present invention. But, form of implementation and accompanying drawing are used for simple diagram and explanation, it should not for limiting the scope of the invention. The scope of the present invention is determined by claim book. In the accompanying drawings, the same parts label in multiple accompanying drawing represents same or corresponding section.
Figure 1A is the sectional view of the In-wheel motor drive device of the wheel hub electric motor with an embodiment of the invention;
Figure 1B is the enlarged view in the IB portion of Figure 1A;
Fig. 2 is the sectional view along elliptical, the local II II line in Figure 1A;
Fig. 3 is the sectional view of the In-wheel motor drive device with wheel hub electric motor in the past.
Embodiment
With reference to the accompanying drawings, embodiments of the present invention are described. Fig. 1 is the sectional view of the In-wheel motor drive device of the wheel hub electric motor with an embodiment of the invention. This In-wheel motor drive device comprises: electric motor 1, and this electric motor 1 is the wheel hub electric motor driving wheel; Speed reduction unit 2, this speed reduction unit 2 makes the rotational deceleration of this electric motor 1; Wheel bearing 5, this wheel bearing 5 is rotated by the output block 4 coaxial with the input shaft 3 of this speed reduction unit 2; Lubricating oil feed mechanism 7. Speed reduction unit 2 is located between wheel bearing 5 and electric motor 1. As the wheel wheel hub of the driving wheel supported by wheel bearing 5, it is connected to same axis in the heart with the turning axle 6 of electric motor 1.
Electric motor 1 comprises motor stator 9 and the electric motor rotor 10 of the inside being received in motor casing 8 respectively.As shown in Figure 2, in motor stator 9, coil 9b is wound on stator core 9a, and motor stator 9 is chimeric and is fixed on the inner peripheral surface of motor casing 8. In addition, in electric motor rotor 10, in rotor magnetic core 10a, being assembled with permanent magnet 10b in V shape, electric motor rotor 10 is installed on turning axle 6, can rotate relative to motor stator 9. It is provided with radius clearance between this motor stator 9 and electric motor rotor 10. That is, this electric motor 1 is the IPM electric motor (so-called embedding magnet type synchronous motor) of radial gap type.
In FIG, in motor casing 8, to arrange bearing 11,12 in the way of axially spaced, these bearings 11,12 rotatably support above-mentioned turning axle 6. The motivating force of electric motor 1 is passed to speed reduction unit 2 by turning axle 6.
Shown in Figure 1B of the enlarged view in the IB portion as Figure 1A, turning axle 6 comprises: axle portion 6a, and this axle portion 6a is rotatably supported by above-mentioned multiple bearing 11,12; Flange part 6b, this flange part 6b are in this axle portion 6a, and in axis, near the centre of two bearings, the periphery in portion expands to outside diameter; Cylindrical portion 6c, this cylindrical portion 6c, from the external diameter end of this flange part 6b, extend to axial both sides parallelly with above-mentioned axle portion 6a.
The periphery of cylindrical portion 6c forms the barrel surface of same diameter in the scope of axial all zones, chimeric electric motor rotor 10 on this periphery. Specifically, electric motor rotor 10, is fixed on turning axle 6 in axial clamping by flange 6d and rotor fixing part 14. This flange 6d is formed at the speed reduction unit opposite side with cylindrical portion 6c (speed reduction unit opposition side) end, and this rotor fixing part 14 by being installed on the speed reduction unit side end of cylindrical portion 6c by bolt 13.
In cylindrical portion 6c, for the speed reduction unit opposition side part 6ca relative to flange part 6b, radial wall thickness is less than speed reduction unit side portion 6cb, that is, internal diameter is formed significantly. The space of the internal side diameter of this speed reduction unit opposition side part 6ca, namely space between axle portion 6a and speed reduction unit opposition side part 6ca forms sensor configuration space 15.
Configure in space 15 at the sensor, the turn-sensitive device 30 of the revolution of detection electric motor rotor 10 is set. Turn-sensitive device 30 is the sensor of winding type, and this sensor comprises: the stator department 31 of the outside diameter being arranged on the cylindrical portion 8a of motor casing 8; The rotor portions 32 of the internal side diameter being arranged on turning axle 6. Like this, stator department 31 and rotor portions 32 are arranged in the side by side radial of turning axle 6 mutually. In the example in fig. 1b, turn-sensitive device 30 is rotating transformer, and stator department 31 is made up of magnetic core 31a and coil 31b, and rotor portions 32 is made up of iron core or coil. Turn-sensitive device 30 is except rotating transformer, it is possible to for rotor portions 32 adopts the form of magnetic code device, Pulsar ring. In addition, stator department 31 also can be the magneticsensor of semi-conductor.
The above-mentioned cylindrical portion 8a of motor casing 8 is outstanding from the speed reduction unit opposite side walls in motor casing 8 towards speed reduction unit side, and its front end arrives the sensor configuration space 15. And, stator department 31 is embedded in its leading section inner circumferential, by the step surface 33 of cylindrical portion 8a and fixing part 35, stator department 31 is fixed in axially clamping, this step surface 33 has step in end edge, for with radial parallel face, this fixing part 35 is fixed on the front end face of cylindrical portion 8a by bolt 34.In addition, by the step surface of axle portion 6a 36 and nut 37, rotor portions 32 fix in axially clamping, the step surface 36 of this axle portion 6a has step in end edge, for radial parallel face, the periphery of this nut 37 and axle portion 6a screws togather. Above-mentioned bearing 11, in the position of this stator department 31 and the speed reduction unit opposition side of rotor portions 32, is arranged between cylindrical portion 8a and axle portion 6a. So, the axial location of turn-sensitive device 30 is arranged between bearing 11,12, and is arranged at the internal side diameter of the cylindrical portion 6c of turning axle 6.
Speed reduction unit 2 is cycloidal reducer in the example of Figure 1A. Owing to cycloidal reducer is known structure, therefore omit its description. Speed reduction unit 2 is not limited thereto. Also can be the speed reduction unit of the various forms beyond illustrated example. Speed reduction unit 2 is arranged on the axle identical with wheel bearing 5 with electric motor 1.
In the input shaft 3 of speed reduction unit 2, axial one end extends to the inside of turning axle 6, chimeric with turning axle 6 by spline. In addition, input shaft 3 is supported by bearing 17 and bearing 19, and this bearing 17 is arranged on the above-mentioned output block 4 of the parts of the outgoing side forming speed reduction unit 2, and this bearing 19 is arranged on the interconnecting piece 18 being connected with output block 4. So, the input shaft 3 of speed reduction unit 2 and motor rotation axis 6 are rotatably supported by bearing 11,12,17,19 one.
In the speed reducer housing 21 receiving speed reduction unit 2, connect the unshowned in the drawings suspension device of vehicle. In addition, this suspension device loads vehicle body. Speed reducer housing 21 and above-mentioned motor casing 8 are fixed mutually.
Wheel bearing 5 comprises: outward member 26, forms the orbital plane of many rows in the inner circumferential of this outward member 26; Interior side's parts 27, on the periphery of these interior side's parts 27, are arranged and the orbital plane faced by each orbital plane; The rolling body 28 of many rows, this rolling body 28 is located between the orbital plane of outward member 26 and Nei Fang parts 27. Interior side's parts 27 are held concurrently with the wheel hub installing driving wheel. This wheel bearing 5 is the angular contact ball bearing of many rows, and rolling body 28 is made up of ball, is kept by retainer for often arranging. Outward member 26 forms Stationary side rail wheel, comprises the flange 26a being installed on speed reducer housing 21. Interior side's parts 27 are chimeric with above-mentioned output block 4 by spline.
Lubricating oil feed mechanism 7 is the mechanism that supply is used for the lubricating oil of the lubrication of speed reduction unit 2 and the cooling these two aspects of electric motor 1. This lubricating oil feed mechanism 7 is by pump 40, inhale on the lubricating oil of the lubricating oil reservoir 41 of speed reducer housing 21 inside, via the lubricating oil flow path 42 being formed on motor casing 8, make the circulation in the speed reduction unit oil circuit 44 of the turning axle oil circuit 43 of turning axle 6 inside and the inside of the speed reduction unit 2 being formed at input shaft 3 and its periphery of above-mentioned lubricating oil.
The action effect of this wheel hub electric motor is described. According to this structure, by this turn-sensitive device 30 being arranged at the internal side diameter of the cylindrical portion 6c of turning axle 6, can being arranged near axial centre side by bearing 11, this bearing 11 is arranged in the side that be set up turn-sensitive device 30 of this turn-sensitive device 30 of supporting with multiple bearings 11,12 of turning axle 6. Thus, the axial size of the electric motor 1 as wheel hub electric motor can be shortened. In addition, by turn-sensitive device 30 being arranged at the internal side diameter of the cylindrical portion 6c of turning axle 6, turn-sensitive device 30 can be reduced, reduce costs. In addition, owing to being arranged at by turn-sensitive device 30 between multiple bearing 11,12, therefore bearing 11 and turn-sensitive device 30 not arrange in the way of radial direction coincidence, can suppress the radial dimension of electric motor 1.
Also have, due to the chimeric electric motor rotor 10 in periphery of the cylindrical portion 6c in turning axle 6, turn-sensitive device 30 is arranged at the internal side diameter of the cylindrical portion 6c of turning axle 6, therefore relative to motor stator 9, electric motor rotor 10, turn-sensitive device 30 is in the state at the hidden back in cylindrical portion 6c. Thus, the impact in the magnetic field of the magnet 10b of the magnetic core 9a from electric motor rotor 9, electric motor rotor 10 can be reduced.
In the present embodiment, the stator department 31 of the winding type that turn-sensitive device 30 is arranged on motor casing 8 for having and the form of rotor portions 32 that is arranged on turning axle 6. In the occasion of this structure, owing to arranging the rotor portions 32 of turn-sensitive device 30 on the axle portion 6a of the turning axle 6 supported by multiple bearing 11,12, therefore rotor portions 32 is difficult to produce vibration, and accuracy of detection is stablized. In addition, owing to adopting the turn-sensitive device 30 of winding type, therefore there is the impact being difficult to be subject to noise, even if when being high temperature, low temperature, vibration etc., the advantage that still can use.
Further, as present embodiment, if stator department 31 and rotor portions 32 are arranged in the side by side radial of turning axle 6 mutually, the length in the turning axle direction of turn-sensitive device 30 can be shortened, can compactly turn-sensitive device 30 be arranged at the inside of motor casing 8. If arranging said stator portion 31 and rotor portions 32, the diameter of turn-sensitive device 30 becomes big, but, as the example in figure, turn-sensitive device 30 can be arranged in the wider sensor configuration space 25 being formed between the axle portion 6a of turning axle 6 and cylindrical portion 6c.
Further, in the present embodiment, owing to turn-sensitive device 30 adopts rotating transformer. Even if rotating transformer still can use under being the mal-condition of high wet, low temperature, vibration etc., and resolving power height, therefore the wheel hub electric motor for automobile is preferred.
As wheel hub electric motor, by adopting the above-mentioned electric motor 1 of above-mentioned enforcement mode, also can not increase radial dimension for this In-wheel motor drive device equally, axial size can be shortened.
As described above, with reference to while accompanying drawing, preferred form of implementation is illustrated, but, if the technician of this area, after this specification sheets of viewing, can easily expect various change and correcting mode at obvious range content. So, such change and correcting mode should be interpreted as belonging in the scope of the present invention determined according to claim book.
The explanation of label:
Label 1 represents electric motor (wheel hub electric motor);
Label 2 represents speed reduction unit;
Label 5 represents wheel bearing;
Label 6 represents turning axle;
Label 6a represents axle portion;
Label 6b represents flange part;
Label 6c represents cylindrical portion;
Label 8 represents motor casing;
Label 9 represents motor stator;
Label 9a represents magnetic core;
Label 9b represents coil;
Label 10 represents electric motor rotor;
Label 10b represents permanent magnet;
Label 11,12 represents bearing;
Label 30 represents turn-sensitive device;
Label 31 represents stator;
Label 32 represents rotor portions.
Claims (6)
1. a wheel hub electric motor, this wheel hub electric motor comprises:
Motor casing;
Motor stator, this motor stator is fixed on this motor casing, has magnetic core and coil;
Turning axle, this turning axle is via multiple bearing, rotatably it is supported on above-mentioned motor casing, this turning axle comprises axle portion, flange part and cylindrical portion, this axle portion passes through above-mentioned multiple bearing by free rotary ground supporting, this flange part expands from the periphery in this axle portion to outside diameter, this cylindrical portion from the external diameter end of this flange part parallel with above-mentioned axle portion extend;
Electric motor rotor, this electric motor rotor has permanent magnet, is embedded in the periphery of the above-mentioned cylindrical portion of this turning axle according to the mode rotated integrally with above-mentioned turning axle, can rotate relative to above-mentioned motor stator;
Turn-sensitive device, this turn-sensitive device detects the revolution of above-mentioned electric motor rotor, and its axial location is between above-mentioned multiple bearing, and is arranged at the internal side diameter of the above-mentioned cylindrical portion of above-mentioned turning axle.
2. wheel hub electric motor according to claim 1, wherein, above-mentioned turn-sensitive device comprises stator department and rotor portions, and this stator department is arranged in above-mentioned motor casing, and this rotor portions is arranged on above-mentioned turning axle, and this turn-sensitive device is winding type.
3. wheel hub electric motor according to claim 2, wherein, said stator portion and rotor portions are arranged in the side by side radial of above-mentioned turning axle mutually.
4. wheel hub electric motor according to any one of claims 1 to 3, wherein, above-mentioned turn-sensitive device is rotating transformer.
5. an In-wheel motor drive device, this In-wheel motor drive device comprises: the wheel hub electric motor according to any one of Claims 1 to 4; The wheel bearing of supporting wheel; Speed reduction unit, this speed reduction unit makes the rotational deceleration of above-mentioned wheel hub electric motor, is passed to above-mentioned wheel bearing.
6. In-wheel motor drive device according to claim 5, wherein, also comprises lubricating oil feed mechanism, and the supply of this lubricating oil feed mechanism is used for the lubrication of above-mentioned speed reduction unit and the lubricating oil of the cooling these two aspects of above-mentioned wheel hub electric motor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-224312 | 2013-10-29 | ||
| JP2013224312A JP2015089188A (en) | 2013-10-29 | 2013-10-29 | In-wheel motor and in-wheel motor drive unit |
| PCT/JP2014/077804 WO2015064407A1 (en) | 2013-10-29 | 2014-10-20 | In-wheel motor and in-wheel motor driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105684272A true CN105684272A (en) | 2016-06-15 |
Family
ID=53004016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480058795.XA Pending CN105684272A (en) | 2013-10-29 | 2014-10-20 | In-wheel motor and in-wheel motor driving device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9729026B2 (en) |
| EP (1) | EP3065273A4 (en) |
| JP (1) | JP2015089188A (en) |
| CN (1) | CN105684272A (en) |
| WO (1) | WO2015064407A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110431728A (en) * | 2017-05-12 | 2019-11-08 | 宝马股份公司 | For automobile or the motor of motorcycle |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105579265A (en) * | 2013-08-01 | 2016-05-11 | 西蒙·卡萨里 | Electric engine arrangement |
| CN106080154B (en) * | 2016-06-12 | 2018-07-13 | 中国第一汽车股份有限公司 | A kind of motor integrates arrangement with double-clutch automatic transmission |
| DE102017128551A1 (en) * | 2017-12-01 | 2019-06-06 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rotor with cooling |
| US11529864B2 (en) * | 2019-11-29 | 2022-12-20 | Mitsubishi Heavy Industries, Ltd. | Drive device for electric vehicle and electric vehicle |
| KR20220012091A (en) * | 2020-07-22 | 2022-02-03 | 현대모비스 주식회사 | Motor operating module |
| WO2022253498A1 (en) * | 2021-05-31 | 2022-12-08 | Bernward Welschof | Turas drive and tracked vehicle with turas drive |
| KR20230011139A (en) * | 2021-07-13 | 2023-01-20 | 현대모비스 주식회사 | Wheel structure including hub bearing and vehicle including the same |
| CN114421713B (en) * | 2022-01-05 | 2024-05-14 | 株洲齿轮有限责任公司 | Method for cooling motor by lubricating oil in two-in-one electric drive assembly |
| DE102022121431A1 (en) * | 2022-08-24 | 2024-02-29 | Keßler & Co.GmbH & Co.KG | wheel side |
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| JP2010110110A (en) * | 2008-10-30 | 2010-05-13 | Toyota Motor Corp | Resolver-integrated rotating electric machine and rotor core |
| JP2012178903A (en) * | 2011-02-25 | 2012-09-13 | Ntn Corp | Electric vehicle |
| CN103328247A (en) * | 2011-01-21 | 2013-09-25 | Ntn株式会社 | In-wheel motor drive device |
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| JP3591354B2 (en) | 1999-01-29 | 2004-11-17 | 三菱自動車エンジニアリング株式会社 | Motor support structure |
| JP3440082B2 (en) * | 2001-02-19 | 2003-08-25 | 科学技術振興事業団 | In-wheel motor for electric vehicles |
| JPWO2005107049A1 (en) * | 2004-04-30 | 2008-03-21 | 株式会社ミツバ | Brushless motor |
| JP2006094582A (en) * | 2004-09-21 | 2006-04-06 | Toyota Motor Corp | Resolver stator fixing structure |
| CN101208853A (en) * | 2005-03-23 | 2008-06-25 | 波峰实验室责任有限公司 | Electric machine and method of manufacture |
| JP2008141908A (en) * | 2006-12-05 | 2008-06-19 | Jtekt Corp | Brushless motor and electric power steering system equipped with it |
| JP5471206B2 (en) * | 2009-09-08 | 2014-04-16 | 日産自動車株式会社 | Drive unit |
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2013
- 2013-10-29 JP JP2013224312A patent/JP2015089188A/en active Pending
-
2014
- 2014-10-20 WO PCT/JP2014/077804 patent/WO2015064407A1/en active Application Filing
- 2014-10-20 EP EP14856837.1A patent/EP3065273A4/en not_active Withdrawn
- 2014-10-20 CN CN201480058795.XA patent/CN105684272A/en active Pending
-
2016
- 2016-04-19 US US15/132,848 patent/US9729026B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010110110A (en) * | 2008-10-30 | 2010-05-13 | Toyota Motor Corp | Resolver-integrated rotating electric machine and rotor core |
| CN103328247A (en) * | 2011-01-21 | 2013-09-25 | Ntn株式会社 | In-wheel motor drive device |
| JP2012178903A (en) * | 2011-02-25 | 2012-09-13 | Ntn Corp | Electric vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110431728A (en) * | 2017-05-12 | 2019-11-08 | 宝马股份公司 | For automobile or the motor of motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| US9729026B2 (en) | 2017-08-08 |
| US20160233738A1 (en) | 2016-08-11 |
| WO2015064407A1 (en) | 2015-05-07 |
| EP3065273A1 (en) | 2016-09-07 |
| JP2015089188A (en) | 2015-05-07 |
| EP3065273A4 (en) | 2017-07-19 |
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Application publication date: 20160615 |